:root {
            --primary: #1a5f7a;
            --secondary: #2d8cb5;
            --accent: #ff6b35;
            --light: #f8f9fa;
            --dark: #343a40;
            --gradient-primary: linear-gradient(135deg, #1a5f7a 0%, #2d8cb5 100%);
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            line-height: 1.7;
            color: #333;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary);
        }
        .navbar {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            padding: 1rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary) !important;
        }
        .nav-link {
            font-weight: 600;
            color: var(--dark) !important;
            margin: 0 0.5rem;
            transition: all 0.3s;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary) !important;
        }
        .nav-link:after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: var(--secondary);
            bottom: -5px;
            left: 0;
            transition: width 0.3s;
            border-radius: 2px;
        }
        .nav-link:hover:after, .nav-link.active:after {
            width: 100%;
        }
        .hero {
            background: var(--gradient-primary);
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,224L48,213.3C96,203,192,181,288,181.3C384,181,480,203,576,192C672,181,768,139,864,138.7C960,139,1056,181,1152,181.3C1248,181,1344,139,1392,117.3L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom center/cover;
        }
        .hero h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        .hero p {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto 2rem;
        }
        .btn-primary {
            background: var(--accent);
            border: none;
            padding: 0.8rem 2rem;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background: #ff5722;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255, 107, 53, 0.3);
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--accent);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.4s;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
        }
        .card-icon {
            width: 70px;
            height: 70px;
            background: var(--gradient-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 2rem auto 1.5rem;
        }
        .card-icon i {
            font-size: 1.8rem;
            color: white;
        }
        .stat-card {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
            text-align: center;
            transition: all 0.3s;
        }
        .stat-card:hover {
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .bg-light-gradient {
            background: linear-gradient(to right, #f8f9fa 0%, #f1f7fb 100%);
        }
        .service-item {
            padding: 2.5rem;
            border-radius: 12px;
            background: white;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            height: 100%;
            transition: all 0.3s;
        }
        .service-item:hover {
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        .project-card {
            position: relative;
            overflow: hidden;
            border-radius: 12px;
            height: 300px;
            margin-bottom: 1.5rem;
        }
        .project-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .project-card:hover img {
            transform: scale(1.05);
        }
        .project-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(0, 0, 0, 0.7);
            color: white;
            padding: 1.5rem;
            transform: translateY(100%);
            transition: transform 0.4s;
        }
        .project-card:hover .project-overlay {
            transform: translateY(0);
        }
        .client-logo {
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 1rem;
            filter: grayscale(1);
            opacity: 0.7;
            transition: all 0.3s;
        }
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }
        .contact-info {
            background: var(--gradient-primary);
            color: white;
            padding: 3rem;
            border-radius: 12px;
            height: 100%;
        }
        .contact-info i {
            background: rgba(255, 255, 255, 0.2);
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
        }
        .form-control {
            padding: 0.8rem 1rem;
            border: 1px solid #ddd;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            transition: all 0.3s;
        }
        .form-control:focus {
            border-color: var(--secondary);
            box-shadow: 0 0 0 0.25rem rgba(45, 140, 181, 0.25);
        }
        .friendlink {
            background: #f8f9fa;
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            background: white;
            border-radius: 8px;
            color: var(--dark);
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #eee;
            font-weight: 500;
        }
        .flink:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            text-decoration: none;
        }
        footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 1.5rem;
        }
        footer a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            margin-right: 0.8rem;
            transition: all 0.3s;
        }
        .social-links a:hover {
            background: var(--accent);
            transform: translateY(-3px);
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--accent);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 1000;
        }
        .scroll-top.active {
            opacity: 1;
            visibility: visible;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero {
                padding: 6rem 0 4rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 576px) {
            .hero h1 {
                font-size: 2rem;
            }
            .nav-link {
                margin: 0.5rem 0;
            }
            .stat-number {
                font-size: 2.5rem;
            }
        }